Halloween; masquerading evening of October 31st observed in North America
Variation. There may be more regional variations other than these.
A four-year-old girl Wishes you a HAPPY HALLOWEEN.
Related signs: treat or trick.
ABC Story, "Halloween" by Cara Barnett. She demonstrates how to do a great A to Z Halloween story in ASL. She presents three samples. Notice another regional variation of HALLOWEEN she uses. Enjoy.